<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item, index) in goods_info.pics" :key="index">
				<image :src="item.pics_big" @click="preview(index)"></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="goods-price">￥{{ goods_info.goods_price }}</view>
			<!-- 商品的信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品的名字 -->
				<view class="goods-name">{{ goods_info.goods_name }}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 商品的运费区域 -->
			<view class="yf">快递：免运费</view>
		</view>
		
		<!-- 商品的图文区域 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航区域 -->
		<view class="good-nav">
			<uni-goods-nav :fill="true" :options="options" :button-group="buttonGroup" @click="clickHandler" @buttonClick="buttonClickHandler" />
		</view>
	</view>
</template>

<script>
	import { mapState, mapMutations, mapGetters } from 'vuex'
	export default {
		data() {
			return {
				// 商品详情对象
				goods_info: {},
				// 左侧按钮组的配置对象
				options: [{
					icon: 'shop',
					text: '店铺'
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				// 右侧按钮组的配置对象
				buttonGroup: [{
					text: '加入购物车',
					backgroundColor: '#ff0000',
					color: '#ffffff'
				}, {
					text: '立即后买',
					backgroundColor: '#ffa200',
					color: '#ffffff'
				}]
			}
		},
		computed: {
			...mapState({
				cart: 'm_cart/cart'
			}),
			...mapGetters({
				total: 'm_cart/total'
			})
		},
		onLoad(options) {
			// 获取商品id
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		methods: {
			...mapMutations({
				addToCart: 'm_cart/addToCart'
			}),
			async getGoodsDetail (goods_id) {
				const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', { goods_id })
				
				if (res.meta.status !== 200) return uni.$showMsg()
				
				// 使用字符串的replace方法，为img标签添加行内的style
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display: block;" ').replace(/webp/g, 'jpg')
				
				this.goods_info = res.message
			},
			// 轮播图的预览效果
			preview (index) {
				uni.previewImage({
					current: index,
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			// 左侧按钮的点击事件
			clickHandler (e) {
				if (e.content.text === '购物车') {
					// 跳转到购物车页面
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			},
			// 右侧按钮的点击事件
			buttonClickHandler (e) {
				if (e.content.text === '加入购物车') {
					// 组织商品的信息对象，再调用addToCart方法
					const goods = {
						goods_id: this.goods_info.goods_id,       // 商品的Id
					  goods_name: this.goods_info.goods_name,   // 商品的名称
					  goods_price: this.goods_info.goods_price, // 商品的价格
					  goods_count: 1,                           // 商品的数量
					  goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
					  goods_state: true                         // 商品的勾选状态
					}
					this.addToCart(goods)
				}
			}
		},
		watch: {
			total: {
				handler (value, old) {
					const findResult = this.options.find(item => item.text === '购物车')
					if (findResult) {
						findResult.info = value
					}
				},
				// immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
				immediate: true
			}
		}
	}
</script>

<style lang="scss">
// 处理底部内容被goodNav组件遮盖
.goods-detail-container {
	padding-bottom: 50px;
}
swiper {
	height: 750rpx;
	image {
		width: 100%;
		height: 100%;
	}
}

.goods-info-box {
	padding: 10px;
	padding-right: 0;
	.goods-price {
		color: #C00000;
		font-size: 18px;
		margin: 10px 0;
	}
	.goods-info-body {
		display: flex;
		justify-content: space-between;
		.goods-name {
			font-size: 13px;
			margin-right: 10px;
		}
		.favi {
			width: 120px;
			font-size: 12px;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: center;
			border-left: 1px solid #efefef;
			color: gray;
		}
	}
	.yf {
		font-size: 12px;
		color: gray;
		margin: 10px 0;
	}
}

.good-nav {
	position: fixed;
	bottom: 0;
	left: 0;
	width: 100%;
}
</style>
